Products

YAWATA L-55 (For 490N/mmHigh Tensile Strength Steel)

Classification : AWS A 5.1 : E7016,  JIS Z 3211 : E4916U

Approvals : ABS, BV, DNV, LR, NK, TIS

Application : Welding of 490 N/mm2 high tensile strength steels for ships, structures and bridges.

PDFYawata-Pamphlet-L55 .pdf 



YAWATA L-55 is a low hydrogen type electrode for all positions welding. Deposited metal shows excellent crack resistance, mechanical properties and X-ray quality. Vertical and overhead welding are very easy.
AWS A 5.1 : E7016
JIS Z 3211 : E4916U
DIN 1913 : E 51 3 3 B(R) 10
EN 499 : E 42 2 B 12 H5
 
C
Si
Mn
P
S
Cr
Mo
Ni
V
C.L.
Req.    
≤0.15
≤0.75
≤1.60
0.035
0.035
≤0.20
≤0.30
≤0.30
≤0.08
1.75
Typ.    
0.08
0.54
1.10
0.007
0.009
0.09
0.01
0.09
0.01
1.10
Req. = Requirement
Typ. = Typical results
N.S. = Not Specified
C.L. = Combined Limit for Mn + Ni + Cr + Mo + V

 
  Tensile Strength
N/mm2 (kgf/mm2)
Yield Strength
N/mm2 (kgf/mm2)
Elongation
%
Charpy 
2V-notch

ที่ -49oC, J (kgf.m)
Diffusible H2 Content
 
Req.    ≥430 (42) ≥430 (42) ≥17 XX ≤ 10 ml/100g
Typ.    550 (56) 480 (49) ≥32 @ 0oC, ≥ 190 (19.4)
@ -20oC, ≥ 170 (17.3)
 ≤ 5 ml/100g
Diameter/
Length (mm)
2.6/300 3.2/350 4.0/400 5.0/450
Welding Position Current (A)
F 70-10 100-140 150-190 190-240
V-up, OH 60-90 80-120 110-150 130-170
1. Use dry electrodes only.  Damp  electrodes should be re-dried at  300~350℃  for 60 minutes.
2. Backstep method should be applied to prevent blowholes and pits at arc starting and arc length should be kept as short as possible during welding.
3. All water, rust and oil in groove should be completely removed to prevent cracks and blowholes.

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